28a^2b^4c^5-42a^3b^2c^4+56ab^3c^3
rt=coscos2tisintj
findr(t)
0.91 x 2.7
1+12
sketch and solve
8xy; 0<=y<=x<=1
1269176
27991016
22975516
4024380
5451188
43.91597
11401003
10175029
4391597
1140100310175029
727575548426824
